Damper for moistening adhesive cements and the like



H- B. AND M. G. ROGERS- v DAMPER FOR MIOISTENING ADHESIVE CEMEN'TS ANDTHE LIKE.

APPLICATION FILED FEB- 8, I921.

Patented Sept- 13, 1921.

FIG.

[/1 van fors UNITED STATES PATENT OFFICE.

HARRY BOTWRIGHT ROGERS AND MAURICE GOAD ROGERS, OF LONDON, ENGLAND.

DAMPER FOR MOISTENING ADHESIVE CEMENTS ANT) TI-IE LIKE.

Specification of Letters Patent. Patented Sept. 13, 192 1.

lipplication filed February 8,1921. Serial No. 443,405.

To all whom it may concern:

Be it known that we, HARRY BOTWRIGHT Rooms and MAURICE GoAD ROGERS, bothof London, England, subjects of the King of England, have inventedcertain new and use ful Improvements in Dampers for Moistening AdhesiveCements and the like, of which the following is a specification.

This invention relates to a class of dampers for moistening adhesivecements or spreading a film of water or other liquid over a surface, asfor example for moistening gum on envelops', the class of damperreferred to being that in which the damper consists of a chamber tocontain the water or liquid with a slot or other suitably shaped openingin which is fixed a pad of felt or other suitable material which fillsup the slot or opening and on all sides is made to adhere by a cement orotherwise, to the walls of the chamber.

In this class of damper the pad has been fixed in the opening so thatthe water or liquid in the chamber is in direct contact with the pad andpercolates through the same without let or hindrance, and difficulty hasbeen experienced in preventing the water from passing through the padtoo fast. Further there is difficulty in preventing the liquid fromescaping down the sides of the pad forcing a passage between it and thecement by which it is fastened to the walls ofthe chamber. Thisinvention has for its object to overcome these difliculties.

We make a damper as follows ;--reference being had to the accompanyingdrawings in which Figure 1 is a side elevation and Fig. is a verticalsection at right angles to lWe construct a suitably shaped and sizedchamber a of india rubber or other suitable resilient materialpreferably in the form of a tube about four to six inches long which canbe held in the hand, the top end being open and furnished with anair-tight stopper 6, preferably of india rubber, and the other end for acertain length of the tube being gradually flattened as at a so as toform at its extreme end a rectangular or approximately rectangularorifice. We cut a pad of felt 0 approximately square and of such a sizethat when inserted in the rectangular orifice it fills the same. Thispad 0 when treated as hereinafter described is inserted for aboutone-half of its extent in the orifice the other .half or a brush. I i

We coat the upper half or part of the felt intended to be located insidethe chamber with a rubber solution, covering not only the two sides andtwo edges which will be in contact with the walls of the chamber butalso the edge which will be presented to the water or liquid in thechamber. coating is so applied as to make the half or part of the padwhich is within the chamber absolutely waterproof on its surface.

By means of'a rubber solution the two sides and two edges of the padwhich are in contact with the walls of the chamber are joined andhermetically sealed to the walls of the chamber.

We make a very small puncture or hole 0 1n the coating on the upper edgeof the pad 0 which is presented to the water or liquid in the chamberand in order to preventthe puncture or hole from sealing itself up againWe cause a few fibers or threads of the felt to protrude through thepuncture or hole.

This can be effected by piercing the coating with a very fine instrumentwhich has a small hook or other formation to seize and pull a few fibersor threads through the hole when the instrument is withdrawn.

What we claim as our invention and desire to secure by Letters Patent ofthe United States is 1. A damper comprising a chamber adaptpartprotruding to act as ed to contain liquid, and having an opening and anabsorbent pad filling said opening and protruding from an end of thechamber, that part ofthe pad within the chamber having applied thereto aliquid proof coating andthe sides thereof caused to adhere to the sidesof the body of the damper to prevent the passage of water through theopening and a small puncture being provided in the liquid proof coatingin the edge of the pad presented to the liquid within the chamber.

2. A damper comprising a chamber adapted to contain liquid, and havingan opening, an absorbent pad filling said opening and protruding from anend of the chamber, that part of the pad withinthe chamber havingapplied thereto a liquid proof coating and the sides thereof caused toadhere to the sides of the body of the damper to prevent the passage ofwater through the opening, and a small puncture being provided in theThis I liquid proof coating in the edge of the pad presented to theliquid Within the chamber, with means to prevent the puncture frombecoming sealed.

3. A damper comprising a chamber adapted to contain liquid, and havingan opening, an absorbent pad filling said opening and protruding from anend of the chamber, that part of the pad Within the chamber havingapplied thereto a liquid proof ooating and the sides thereof caused toadhere to the sides of the body of the damper to prevent the passage ofWater through the opening, and a small puncture being pr0- vided in theliquid proof coating in the edge of the pad presented to the liquid Within the chamber, With means to prevent the puncture from becoming sealed,said means being constituted by a few fibers of the pad protrudingthrough said puncture.

In witness whereof We have signed this specification in the presence oftWo Witnesses.

HARRY BOTWRIGHT ROGERS. MAURICE GOAD ROGERS. Witnesses JOHN C. ERWIN,REGINALD J. RIDGWELL.

